2151277066 has 4 divisors (see below), whose sum is σ = 3226915602. Its totient is φ = 1075638532.

The previous prime is 2151277061. The next prime is 2151277103. The reversal of 2151277066 is 6607721512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2128438225 + 22838841 = 46135^2 + 4779^2 .

It is not an unprimeable number, because it can be changed into a prime (2151277061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537819265 + ... + 537819268.

Almost surely, 2^2151277066 is an apocalyptic number.

2151277066 is a deficient number, since it is larger than the sum of its proper divisors (1075638536).

2151277066 is a wasteful number, since it uses less digits than its factorization.

2151277066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075638535.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 2151277066 is about 46381.8613899874. The cubic root of 2151277066 is about 1290.9183745411.

Adding to 2151277066 its reverse (6607721512), we get a palindrome (8758998578).

The spelling of 2151277066 in words is "two billion, one hundred fifty-one million, two hundred seventy-seven thousand, sixty-six".